new Promise((resolve, reject) => {
    setTimeout(() => {
        resolve('result')
    })
}).then(res => {
    if(res == 'result') {
        return new Promise(() => {})
    }
}).then(() => {
    console.log('budayin'); 
}).catch(() => {
    console.log('budayin'); 
}).finally(() => {
    console.log('budayin');
})
// 无打印